Shingle lock



F. E. LlETZ SHINGLE LOCK,

Feb. 26, 1929.

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Patented Feb. 26, 19290 UNITED STATES PATENT OFFICE.

FELIX E. LIETZ, OF BUFFALO, NEW YORK, ASSIG-NOR TO FLINTKOTE COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS SHINGLE LOCK.

Application filed May 7,

This invention relates to a lock or fas-' tener for flexible shingles and more particularly a locking device for a shingle having a-slot in its turned-under corner such, for example, as covered by Letters Patent of the United States $51,583,254 granted to me May 4, 1926.

The object of the invention is the provision of an inexpensive compensating fastener which permits the shingle to be readily adjusted sidewise as well as up or down to alinc it properly with adjacent shlngles and at thesame time allow the shingle to expand or contract both vertically and laterally, in response to changes of temperature, thus preventing buckling of the shingle and permitting it to lie smooth under all weather conditions.

In the accompanyingdrawings Figure 1 is a fragmentary top plan view of a roof embodying the invention. F1gure 2 is a similar enlarged view, partly in section, the sectional portion being on line 2-2, Figure 4. Figure 3 is a view similar to Figure 2, showing the lateral shifting capacity of the fastener. Figure 4 is an enlarged vertical section on line 4-4, Figure 1. Figure 5 1s a perspective View of the fastener.

Similar characters of reference indicate corresponding parts throughout the several views.

10 indicates the usual sheathing or roof.

boards and 11 the starting strip of roofing material laid along the lower margin of the roof.

The shingles 12am preferably constructed of composition roofing, such as felt saturated with asphalt and faced with crushed slate or similar mineral; and they are cut square and laid diagonally in overlying courses as usual.

The lower corner 13 of each shingle is folded under its body and provlded centrally with a vertical slot 14 which interlocks with the improved fastener.

This device, in the preferred formshown in the drawing, comprises a pointed shank 15 adapted to be driven into the roof, 9. cranklike arm 16 projecting from its outer end and a head 17 of substantially T-form,

' whose stem is parallel with the shank or nearly so. These sevral parts can be cheap- 1y formed from a single piece of round steel 1927. Serial No. 189,564.

wire, but the fastener may be cast or stamped if desired. The cross-head of the fastener is long enough to overlap the turned undercorner of the shingle some distance on either side of its slot to form a strong lock which firmly holds that corner down in place against the lifting action of wind storms.

In laying and looking a shingle with this fastener, assuming. a course of shingles to have been previously laid, the shank 15 of the fastener is driven through the upper corner of an underl ing shingle into the roof boards at a point below and in line with the meeting side corners of two previously laid shingles and with the crank arm 16 extending above the shank, as shown by full lines in the drawing. A shingle with its slotted corner turned under, is then interlocked with the cross bar of the T-head bybringing the slot in line therewith, as shown b dot and dash lines Figure 2; then giving t e shingle an upward quarter turn to its normal position, as shown by broken lines in said figure bringing the slot at right angles to the cross head and finally nailing the side corners of the shingle to the roof boards.

By the use of this fastener, the slotted shingle after being interlocked with the driven fastener and before being nailed at its side corners, can be shifted not only up or down to accurately aline its folded lower edge and side corners with those of adjacent shingles in the same course, but it can also be shifted sidewise, the crank arm 16 of the shank following such lateral movement of the shingle as shown by dot and dash lines Figure 3, and turning the shank in its opening, without however, loosening the fastener and rendering it less secure. By this capacity of the locking head of the fastener to move or swing laterally more or less after the shingle has been interlocked therewith, the fastener compensates for lateral expansion and contraction of the shingle, thus effectively guarding against its buckling, keeping it flat and smooth and preserving the sightliness of a roof covered with slotted shingles locked by such fasteners. The crank arms of the fasteners afford sufiicient leverage to turn their shanks in the roof boards under the expanding and an angle to the cross-her Jith said eosecl at eacl.

nntlerturneel cornei? iastener, the shingie sic 2. The combination an gle stener comprisin J arm extending latetaiiy cr0ss-hea i at the end oi P a flexible shingie having turned corner interlocking tenet the cross-head of saii tending at an angle to said the slot in the shingle,

FELIX E. lLllETZ.

said fasstener exand to 

